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PAH

FG XR6T Rear Axle Replacement Options

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Guys,

 

My 2008 XR6T is making a bit of a hummy noise on cruise at about 110kmh.  I can rule out the tailshaft.  The next suspects on my hit list are the half shaft axles to the rear wheels.  Should the OEM factory axles last longer than 10 years / 130k kms?

 

The factory axles have been OK for the first 10 years so I suspect that they should be OK for the next 10 years.  I'm looking at around $2100 for new factory axles plus fitting and $3000 for Heavy Duty axles.  Has anybody found a supplier of quality FG XR6T axles at a better price?

 

Another worry is my Eddie-the-Expert backyard diagnostics.  I'm chasing a hummy noise at 110kmh on cruise on uphill runs.  The noise disappears when coasting downhill.   If I add the axles to the tailshaft shotgun list, what's next when chasing (assumed) transmission noise?  

 

 

PAH

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Does the noise change with throttle input (diff) does it vary with side load (going around corners) wheel bearings, as you vary the load going around corners ie a hardleft turn will put weight on the right wheel bearing and the noise will change. tailshaft problems are 'usually' acompanied by vibrations.Axels you can get from repco for about $200 each, they look stronger (thicker) than genuine but they are about the same with better warranty than ford. I'm thinking its the diff but it could be as simple as exhaust touching or stuffed diff bush's. Get some one to drive while you sit in the back & try to zero in on where the noise is comimg from

Edited by 4321

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4321,

 

Thanks for the info mate.  The Repco axles last as long as the factory Ford parts?

 

I've been reading another thread on the forum and I picked up that Pedders sells 700HP axles.  Does anybody have any info on these?  I'll guess that they're heaps more than $200 each.  Any feedback from anybody on the Pedders axles?

 

I also found the AADI web page.  Has anybody tried the AADI axles and if so any feedback?

 

PAH.

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Thanks Puffwagon,

 

Where's the Driveshaft Shop?  Looks like its in the USA.  Correct?

 

I just picked up that Repco have a 25% discount on XR6T driveshafts but the sale ends Sunday 10th March 2019.   If anybody has any negative feedback about these shafts please let me know QUICKLY.

 

https://www.repco.com.au/en/brands/repco/repco-cv-drive-shaft-nsa1038/p/A9496175

 

PAH

Edited by PAH

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K31TH,

 

Greetings and hallucinations.   And thanks for the info.

 

On the one hand, I've had the since new and it's 10 years old.  I'm not sure that I'll need to get another 10 years out of replacement Repco drive shafts.  Not unless FG XR6T prices jump north like GTHO and XU-1 prices.  On the other hand the last 10 years include standard running with the factory flywheel 270kw's.  

 

I suspect that the Pedders 700hp shafts will be heaps more $ than the Repco shafts on special tomorrow so I think I'll give the Repco units a go.

 

Thanks all for your inputs.

 

 

 

PAH

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Admin,

 

Yeah could be.  That's how you ID a crook driver isn't it?  The clutch shudders and the diff whines when they see the crook driver take out his car keys?

The diff whines that I've heard make a constant noise under power.  The noise I'm hearing is sorta like an AC sine wave:  thrum .. thrum .. thrum under power at 110kmh uphill.  

 

I just bought new rear axles from Repco.  30% off today.  Each shaft cost $240.  They signed me up for a Repco VIP card which gives 10% any other day.  Here's hoping that the Repco axles are as good or better than the OEM parts.

 

 

PAH

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Admin,

 

Yeah fair point.  If the axles aren't the problem then it's preventative maintenance.  I'll keep the originals as spares.   What's the life expectancy for axles?  My FG is coming up to 130k. 

 

 

 

PAH

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There's also a cv joint at the back of the tail shaft. Perhaps you could take it to a transmission specialist for a diagnosis before you start throwing parts at it? 

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